Upgrading my Nutanix block to NOS 4.1.4

2 min read

Kees Baggerman·Senior Technical Director at Nutanix – Former Citrix CTP – NVIDIA Enterprise Platform Advisor – 15+ years in EUC

All posts →

Just recently Nutanix released Nutanix Operating System (NOS) version 4.1.4, Magnus Andersson (part of the Performance and Solution engineering team just like me) wrote a small blogpost on the enhancements in 4.1.4 here. As my cluster was still on NOS 4.1.3 I finally had a moment to sit down and update my cluster.

I wanted to follow up on our own documentation so I gathered the information to do an upgrade as if in production and ran NCC which informed me that there was an issue with the health check service on one of my CVMs. Rather than going down the troubleshooting route I decided to reboot the CVM to see if the problem would still exist but after a reboot my CVM would boot any more, it said: ‘Operating System not found’ but because of the distributed nature of our architecture my VMs would operate without any issues while the performance stayed on par so I had some time to figure out the problem.

After talking to one of our unsung hero’s of support I was pointed to a KB article that could create a recovery ISO to see if there was hardware failing, during that process I noticed that this specific CVM did not have the service VM ISO mounted anymore and it all fell into place.

I recently ran a PowerCLI script to unmount the CD-ROM drives and apparently I didn’t exclude the CVMs causing the service VM ISO to be unmounted. Mounting the ISO file from the local storage did the trick and I was able to boot the CVM, ran the PreCheck and do a cluster upgrade within 20 minutes.

Take aways for me during this upgrade:

• Always run NCC before a cluster update
• Our support is absolutely awesome
• Exclude CVMs from PowerCLI scripts
• Modifications to our NCC check are already filed so we check if the ISO is actually mounted in feature releases of NCC.
• I’m an idiot 🙂

The following two tabs change content below.

• Bio
• Latest Posts

Kees Baggerman

Kees Baggerman is Senior Technical Director — Performance & Solutions Engineering R&D at Nutanix, where he leads a global team responsible for defining how enterprise applications are delivered on the Nutanix platform. A former Citrix Technology Professional and NVIDIA Enterprise Platform Advisor, he has spent 15+ years driving EUC strategy and technical direction across architecture, product, and customer success. He has been writing here since 2011 — sharing what he learns at the intersection of platform engineering and enterprise IT.

Latest posts by Kees Baggerman (see all)

• Your Cloud Desktop Is Running on Yesterday’s Silicon - May 21, 2026
• When the Orchard Ships Production Software: AI-Augmented Development in the Real World - May 17, 2026
• Nutanix Documentation Script v5.0: Visual Reports, Brand Templates, and Seven Embedded Diagrams - May 15, 2026
• Nutanix AHV and Citrix MCS: Adding a persistent disk via Powershell – v2 - November 19, 2019
• Recovering a Protection Domain snapshot to a VM - September 13, 2019

Kees Baggerman

Senior Technical Director at Nutanix - Former Citrix CTP - NVIDIA Enterprise Platform Advisor - 15+ years in EUC

Kees Baggerman is Senior Technical Director — Performance & Solutions Engineering R&D at Nutanix, where he leads a global team responsible for defining how enterprise applications are delivered on the Nutanix platform. A former Citrix Technology Professional and NVIDIA Enterprise Platform Advisor, he has spent 15+ years driving EUC strategy and technical direction across architecture, product, and customer success. He has been writing here since 2011 — sharing what he learns at the intersection of platform engineering and enterprise IT.

X / Twitter LinkedIn GitHub Email